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8-4
Adjustment and test
8-4-1
Span adjustment and span test
Span adjustment is to “decrease” the difference between an indicated value and the true value (mass),
and span test is to “check” the difference between an indicated value and the true value.
This must be performed without fail in the case of doing high-accuracy weighing work.
Because an electronic scale is affected by the acceleration of gravity, adjustment/test is needed at every
weighing location. The adjustment/test is also needed when (1) using a long period and (2) an accurate
indication does not appear any longer.
When “Advice CAL” is activated, the scale generates an alarm when calibration is needed.
(1) An external weight used for the span adjustment shall be the one equivalent to:
- OIML class F1 or higher for models with capacity of 33 kg and 62 kg;
- OIML class F2 or higher for models with capacity 17 kg and 22 kg.
(2) The span adjustment significantly affects the weighing accuracy. Please read this procedure
carefully before getting to the adjustment.
8-4-1(1) Span adjustment with external weight
This function is unavailable for verified scale.
Free key <<CAL>> (span adjustment with external weight) is assigned to <<F1>> on the models
without internal calibration weight).
1
Select the span adjustment with external
weight.
- Press [Menu] key, then press [1]-[4]
keys to go to <631 EX CAL>.
- Press [4] key to execute.
2
For HJ17K0.1S(R), HJ22K0.1S(R) and
HJ33K0.1S(R):
Select the minimum interval for rounding the
weight of the external weight.
- Press [1]/[2] key to select
1: 0.1 g
2: 0.2 g
5: 0.5 g
10: 1 g
- Press [4] key to fix.
* This step is skipped for HJ62K0.1DS(R).
3
Select a weight used for the span adjustment.
- Press [1]/[2] key and select a weight
used for the span adjustment.
(Refer to List of “weights used for the
span adjustment by model”
）
- Press [4] key to fix.
4
Zero-point adjustment starts.
Display changes to the order of "blinking
of <buSY>" → “blinking of <on 0>”.
On completion of the zero-point
adjustment, the display automatically
changes to <on FS>.
